Binder-lock.



PATENTED JUNE 30, 1908.

G. A. SHOEMAKER.

BINDER LOOK.

APPLICATION FILED DEO.21,1903.

w/e ineaaes sirable form or style or number.

tiTflCiflihB GEORGE A. SHOEMA KER,

OF CHICAGO, ILLINOIS, ASSIGNOR TO Bi\KER-Vi\\\'TER COMPANY,

OF PORTLAND, MAINE, A CORPORATION- BINDER-LOCK.

Specification of Letters Patent.

Patented June 30, 1908.

Application filed Decemberfil, 1903. Serial No. 186,049.

MAKER, a citizen. of the United States, residing at Chicago, in theState of Illinois, have invented a new and useful improvement in-Binder-Loc is, of which the following is a full and accuratedescription, reference being had to the accompanying drmvings.

My invention relates especially to that class of binders, in whicheconomy ol con struction is desired, nod resides in thepe culiarniecluinisn'i herein described, by which simplicity, strength andeconomy of nnune factors is secured.

In the drawin 's, Figure 1 represents in perspective a binder tittedwith my loch. Fig. 2 is an enlarged View of a vertical sec tion takenthrough the lino 2-2 of Fig. 1. Fig. 3 is a horizontal sectional viewtaken through the line 3-35 of Fig. i. Fig. 4 is a detail drawing ol theseveral parts of my locking mechanism.

More particularly A and A represent the binding bars of my binder.

P, B, represent the binding posts of my binder, which preferably consistof telescop ing sec-tionsosecured rcspectivehv to the bars A and A, butmay be constructinl of any dei prefer to construct them as follows:Projecting from the bar A is a stud b. In opposition thereto, and havingtelescopic relation therewith, a tube b projects from the our ll. and is'l'itted at its inner or free end with on lll.\\ul'tlly turned rim orshoulder t". Fitted in the upper or free end oi the stud Z is a screw 1)the head of which is larger in diameter than the stud Z), and isdesigned. to engage with the rim or shoulder l)" as the sections l1 andb" are drawn apart, thereby operating as it stop to arevent thesoparaticm. ol the sections 6 C. 0. represent the locking; posts of mybinder. 'lhey are identical in construction and may be one or more asdesired. The construction ol the said locking post (I as follows:-'lwotubes 0 and c are attached respectively to the binding bars A and A, anohave telescoping engagement, the tube 0 being the smaller. The inner orfree end of the tube 0 is slotted c ior the purposes hereinafter named.Lying within the tube a and projecting from either on d thereof is ashaft The upper end of said. shaft o or the end nearestthe binding bar Aprojects through a suitable aperture in the said her A and beyond theouter face of the said binding bar A. Thisupper end of the said shaft isthreaded (1* as shown in detail in Fig. 4. The lower end ol the saidshaft 0 is fitted with a head 0 which is formed by a gradual enlargementol the said shaft 0 at its inner or lower end, until the, shalt becomesin diameter equal in size to the diameter of the outer face of the tube0 Projecting from the face of the shaft 0 near its lower end, are one ormore lugs c c", which engage with the said slots Fitted upon the upperor threaded end 0 of the said shaft is a thumb nut c, which is larger indiameter than the aperture in the said binding bar A, through which theshaft 0 projects, and said thumb not a rists upon the outer face of thesaid binding bar A, in operation. To prevent the thumb nut c from beingremoved from the end, of the shaft 6 in operation, 1 countersink in itsupper face the small screw 0 which I screw into the end of the shaft 0The head ol this screw 0 is of su'ch size as to prevent the thumb nut cfrom being turned tree from the end 0* ol' the shaft 0. I

In operation the tubes 0 and c in tolescopic engagement, the thumb nutbeing released or turned toward the outer end of the shaft 0, the head aof the shaft lies outside of the tube c and in contact with its slottedor inner end, and within the larger tube a. The thumb nut c is thenturned from the end 0 of the shaft, the lugs a" a engaged with the slots0? c preventing the shaft from revolving, and the said thumb nut being,shouldored upon the outer face of the binding bar A the shaft 0 is drawnupwards through the tube a. This action draws the head. within the tube0. The said head 0 being at its outer end larger than the bore of thesaid tube, the action of drawing the head within the tube expands theadjacent or lower end of the tube 0. This expansion is made possible bythe slotting c c of the said tube a. The expanded end of the said tube 0thereupon impinges the inner face of the tube 0, end the looking isell'ected by the frictional contoctof the two tubes.

The operation of releasing the lock is the reverse of the one justdescribed. The release of the shaft 0 by turning the thumb screw 0toward the end 0" of the shut t, allows the head 0 to be forced out ofthe lower end 6 seams of the tube 0 by the tension of the slotted end ofthe tube a.

While I have described a particular construction embodying my invention,I would not be confined in the matter of detail to the same; but Wouidclaim the right to var r or modify the construction missible Within thespirit of my invention Covers may be employed if desire 'What I claimis 1. in a binder, the combination with bindin bars, and binding posts,of a locking post, comprising two telescoping tube sections attachedrespectively to said binding bars, the sinalier of which sections isfitted at its inner or telescoping end with slots, a shaft extendingthrough said smaller tube, its lower end being enlarged to a diameterlarger than that of the bore of said smaller section, extending beyondand adjacent to thesaid slotted end of said smaller section, lrwsextendnw from the face ot said shaft in an manner peri;- said bindingbar, and a thumb nut larger in diameter than said aperture, engagingsaid tnreaded end of the said shaft, substantially as described, and forforth.

A loose leaf binder comprising in combination with covers, a tubefastened to the inside face of one cover, a tube open at both ends andfastened to the other cover and telescoping with the first tube andhaving a split end, means for expanding the end to clamp the outer tube,and means closing the outer mouth of the inner tube and arranged tooperate said expanding means.

GEORGE A. SHOEMAKER.

Witnesses:

O. B. BARKER, Jr, 1. M. PEARSON.

the purposes herein set

